TY  - JOUR
AU  - Oelmann, Y.
AU  - Kreutziger, Y.
AU  - Temperton, V.  M.
AU  - Buchmann, N.
AU  - Roscher, Ch.
AU  - Schumacher, J.
AU  - Schulze, E.-D.
AU  - Weisser, W. W.
AU  - Wilcke, W.
TI  - Nitrogen and phosphorus budgets in experimental grasslands of variable diversity
JO  - Journal of environmental quality
VL  - 36
SN  - 0047-2425
CY  - Madison, Wis.
PB  - ASA [u.a.]
M1  - PreJuSER-56229
SP  - 396 - 407
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - Previous research has shown that plant diversity influences N and P cycles. However, the effect of plant diversity on complete ecosystem N and P budgets has not yet been assessed. For 20 plots of artificially established grassland mixtures differing in plant diversity, we determined N and P inputs by bulk and dry deposition and N and P losses by mowing (and subsequent removal of the biomass) and leaching from April 2003 to March 2004. Total deposition of N and P was 2.3 +/- 0.1 and 0.2 +/- 0.01 g m(-2) yr(-1), respectively. Mowing was the main N and P loss. The net N and P budgets were negative (-6.3 +/- 1.1 g N and -1.9 +/- 0.2 g P m(-2) yr(-1)). For N, this included a conservative estimate of atmospheric N(2) fixation. Nitrogen losses as N(2)O were expected to be small at our study site (<0.05 g m(-2) yr(-1)). Legumes increased the removal of N with the harvest and decreased leaching of NH(4)-N and dissolved organic nitrogen (DON) from the canopy. Reduced roughness of grass-containing mixtures decreased dry deposition of N and P. Total dissolved P and NO(3)-N leaching from the canopy increased in the presence of grasses attributable to the decreased N and P demand of grass-containing mixtures. Species richness did not have an effect on any of the studied fluxes. Our results demonstrate that the N and P fluxes in managed grassland are modified by the presence or absence of particular functional plant groups and are mainly driven by the management.
KW  - Agriculture: methods
KW  - Biodiversity
KW  - Biomass
KW  - Fabaceae: growth & development
KW  - Nitrates: analysis
KW  - Nitrogen: analysis
KW  - Phosphorus: analysis
KW  - Poaceae: growth & development
KW  - Quaternary Ammonium Compounds: analysis
KW  - Rain
KW  - Soil: analysis
KW  - Nitrates (NLM Chemicals)
KW  - Quaternary Ammonium Compounds (NLM Chemicals)
KW  - Soil (NLM Chemicals)
KW  - Phosphorus (NLM Chemicals)
KW  - Nitrogen (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:17255627
UR  - <Go to ISI:>//WOS:000244979300007
DO  - DOI:10.2134/jeq2006.0217
UR  - https://juser.fz-juelich.de/record/56229
ER  -